Αn αtσm íѕ thє ѕmαllєѕt pαrtíclє σf αn єlєmєnt thαt cαn tαkє pαrt ín α chєmícαl rєαctíσn...αтσмѕ я νєяу, νєяу ѕмαℓℓ ιи ѕιzє•••

An atom is the smallest unit of matter that retains the properties of an element. Atoms are made up of three types of particles: protons, neutrons, and electrons.


The structure of an atom can be divided into two main parts: the nucleus and the electron cloud.


The nucleus is the central part of an atom and contains positively charged protons and neutral neutrons.


The electron cloud is the region surrounding the nucleus where negatively charged electrons are found. Electrons are arranged in different energy levels or shells around the nucleus.


The atomic number of an element is the number of protons in the nucleus of an atom. The mass number of an atom is the sum of the number of protons and neutrons in the nucleus.


Isotopes are atoms of the same element with different numbers of neutrons in their nuclei. Isotopes have the same atomic number but different mass numbers.


Molecules are made up of two or more atoms that are chemically bonded together. They can be composed of atoms of the same element or different elements.


Ions are atoms that have gained or lost electrons and have a net electrical charge. Cations are positively charged ions, and anions are negatively charged ions.


Understanding the structure of atoms is essential in understanding the properties and behavior of matter. The study of atoms and molecules is crucial in chemistry, physics, and many other fields of science.